Indexzugriff
Indexzugriff, also known as indexed access or index lookup, refers to the process of retrieving data from a database table by using an index. An index is a data structure, typically a B-tree or hash table, that stores a subset of a table's columns in a sorted order. This sorted order allows the database system to quickly locate specific rows without having to scan the entire table.
When a query involves a condition on an indexed column, the database can consult the index instead
The effectiveness of indexzugriff depends on several factors. The presence of a suitable index is paramount.